Answer: zero-based learning for civil builders. I suggest you find a master to take you to the construction site to do things from scratch, follow the master, do things according to his requirements, study hard by yourself, and read some professional books related to your work after work. After a year or two of hard work, you should be able to operate independently. If you can do the information again, you should be a basically qualified builder. Another thing is that if you meet the requirements,